===================================================================
RCS file: /cvs/mandoc/Attic/mdoc.3,v
retrieving revision 1.2
retrieving revision 1.3
diff -u -p -r1.2 -r1.3
--- mandoc/Attic/mdoc.3	2009/01/16 15:58:50	1.2
+++ mandoc/Attic/mdoc.3	2009/01/17 16:15:27	1.3
@@ -1,5 +1,5 @@
 .\" 
-.Dd $Mdocdate: January 16 2009 $
+.Dd $Mdocdate: January 17 2009 $
 .Dt mdoc 3
 .Os
 .\"
@@ -127,6 +127,12 @@ utility was written by 
 .\"
 .\"
 .Sh BUGS
+Both bugs and incompabilities are documented in this section.  An
+incompatible macro or behaviour is relative to the default
+.Xr groff 1
+system bundled with 
+.Ox .
+.Pp
 The 
 .Sq \&Xc
 and
@@ -141,3 +147,7 @@ When 
 is invoked, whitespace is not stripped around
 .Sq \&Ta
 or tab-character separators.
+.Pp
+The 
+.Sq \&At
+macro only accepts a single parameter.